Why a bottle ends up here
One of three reasons: age (12+ years), damage (cracked bottle wall, cracked outlet boss, failed cage welds), or contamination history that prevents return to fluid service (aromatic solvents, chlorinated compounds, unknowable contents).
HDPE pellet from the first two streams (clean contents history) goes into irrigation pipe, drainage tile, plastic lumber, and recycled extrusions. Pellet from the third stream is segregated and sent to industrial-only applications that don't include food or potable end-use.
Cages go to scrap metal recyclers at $0.04–$0.08/lb. Pallets either get reused (plastic and steel) or composted (wood when sound).